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Heroes of the Telegraph
·
John Munro
40
During
the
two
and
a
half
years
from
November,
1832,
to
the
summer
of
1835
he
was
obliged
to
change
his
residence
three
times,
and
want
of
money
prevented
him
from
combining
the
several
parts
of
his
invention
into
a
working
whole.
In
1835,
however,
his
reputation
as
an
historical
painter,
and
the
esteem
in
which
he
was
held
as
a
man
of
culture
and
refinement,
led
to
his
appointment
as
the
first
Professor
of
the
Literature
of
the
Arts
of
Design
in
the
newly
founded
University
of
the
city
of
New
York.
In
the
month
of
July
he
took
up
his
quarters
in
the
new
buildings
of
the
University
at
Washington
Square,
and
was
henceforth
able
to
devote
more
time
to
his
apparatus.
The
same
year
Professor
Daniell,
of
King's
College,
London,
brought
out
his
constant-current
battery,
which
befriended
Morse
in
his
experiments,
as
it
afterwards
did
Cooke
and
Wheatstone,
Hitherto
the
voltaic
battery
had
been
a
source
of
trouble,
owing
to
the
current
becoming
weak
as
the
battery
was
kept
in
action.
The
length
of
line
through
which
Morse
could
work
his
apparatus
was
an
important
point
to
be
determined,
for
it
was
known
that
the
current
grows
feebler
in
proportion
to
the
resistance
of
the
wire
it
traverses.
Morse
saw
a
way
out
of
the
difficulty,
as
Davy,
Cooke,
and
Wheatstone
did,
by
the
device
known
as
the
relay.
Were
the
current
too
weak
to
effect
the
marking
of
a
message,
it
might
nevertheless
be
sufficiently
strong
to
open
and
close
the
circuit
of
a
local
battery
which
would
print
the
signals.
Such
relays
and
local
batteries,
fixed
at
intervals
along
the
line,
as
post-horses
on
a
turnpike,
would
convey
the
message
to
an
immense
distance.
'If
I
can
succeed
in
working
a
magnet
ten
miles,'
said
Morse,'I
can
go
round
the
globe.
It
matters
not
how
delicate
the
movement
may
be.'
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